Model studies of the interaction of base-metal containing minerals with some biological alteration compounds in ore-bodied environment

Studies dealing with the complex behaviors of some N-benzoyl and N-formyl amino acids, and dipeptides with base-metal containing compounds were carried out. The results indicate that coordination sites of N-protected amino acids and dipeptides are different from those of the free amino acids and peptides. Complexes of Zn (II) with N-benzoyl derivatives of L-leucine, L-leucylglycine and N-formyl derivatives of DL-valine, L-phenylalanine, DL-valylglycine and L-phenylalanylglycine were prepared in the course of the studies. The possible stereochemistry of these compounds have been deduced with the help of analytical data, infrared spectra (IR), thermogravimetric analysis (TGA) and differential thermal analysis (DTA).